Strange new text, different styles

I hit a strange glitch today while adding new texts to a folder of blog posts. The text icon is generally a white… text icon with four little lines

Unprovoked, it started adding yellow icons that look a bit like the text ones but slightly different (see screenshot). But the annoyance is, all the styles are different.

I can’t find any preference setting or information items that explains this difference – or how to get out of it!

Screenshot of binder

I think you’ve accidentally put them in Script mode. I think it’d Cmd-8 (I don’t use Script mode myself).